VIN vs Registration Number — What's the Difference?
Buyers and even some sellers use 'reg' and 'VIN' interchangeably. They are not the same thing, and the distinction matters when you are trying to track a vehicle's history.
What a registration number is
A registration number (number plate, license plate, plate number) is issued by the country's vehicle licensing authority and is attached to the car for the purpose of identifying it on the road. In the UK it is issued by the DVLA; in Germany by the Kraftfahrt-Bundesamt; in France by the ANTS.
A registration number can be transferred between vehicles (the owner buys a personal plate and moves it from car to car), reissued when a vehicle is exported and re-imported, and changed when a car moves between regions of the same country. It is mutable.
What a VIN is
A VIN is issued by the vehicle's manufacturer at the moment of production and is stamped into the chassis itself. It identifies that specific physical vehicle for as long as the vehicle exists. It cannot be transferred. It cannot be reissued. Two cars cannot share one. It is immutable.
When the manufacturer logs a service or a recall, they log it against the VIN — not the registration. The registration on the car when the work is performed is irrelevant to the manufacturer's record.
Why this matters when checking history
A registration check tells you everything the licensing authority knows: tax status, MOT or inspection history, current registered keeper, and so on. It is tied to the plate, not the chassis.
A VIN check tells you everything the manufacturer knows: dealer service visits, recalls, warranty work, original specification. It is tied to the chassis, not the plate.
A complete picture needs both. If the registration has changed during the vehicle's life — common on imports, retired plates, or transferred personal plates — only a VIN check will see continuity across that change.
Where to find each one
The registration number is on the plates and on the V5C. The VIN is on the V5C as well, but also on the dashboard and the door jamb. If any two of those three places disagree on the VIN, the car is not what it claims to be.
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